| Ventum 60 Hydronic Air Handler, 2,000 CFM | hydro-smart.com | 3050.99 USD | — | — |
| Ventum 40 Hydronic Air Handler, 1,100 CFM | hydro-smart.com | 2586.99 USD | — | — |
| BuffMax - Buffer Tank | wholesalehome.com | 1476.25 USD | — | — |
| Breaker 100A | hydro-smart.com | 288 USD | — | — |
| Boiler Temperature Control ULTRA | hydro-smart.com | 269.57 USD | — | — |
| Thermo2000 6 kW element for three-phase electric boiler (208V, 480V, 600V) | nordikradiant.com | 149.41 CAD | — | — |
| Contactor 4 poles Coils 24V Contact 600V 50 Amp. Res. | hydro-smart.com | 142.85 USD | — | — |
| Relay,3-Pole,24V,30A | hydro-smart.com | 142.85 USD | — | — |
| Thermo2000 5 kW element for three-phase electric boiler (208V, 480V, 600V) | nordikradiant.com | 138.1 CAD | — | — |
| Thermo2000 4.5 kW element for three-phase electric boiler (208V, 480V, 600V) | nordikradiant.com | 120.53 CAD | — | — |
| Contactor Compact 2 poles Coil 120V Contact 600V 50Amp Res. | hydro-smart.com | 118.66 USD | — | — |
| Contactor Compact 2 poles Coil 24V Contact 600V 50Amp Res. | hydro-smart.com | 118.66 USD | — | — |
| Thermo2000 3 kW element for three-phase electric boiler (208V, 480V, 600V) | nordikradiant.com | 109.23 CAD | — | — |
| Temperature surface High-Limit manual reset switch (227F) for Thermo2000 boiler | nordikradiant.com | 86.42 CAD | — | — |
| Temperature surface high limit, manual reset 227F | hydro-smart.com | 84.1 USD | — | — |
| Tridicator 3''dia. 0/60psi, 0/120C 1/2'' NPT bottom | hydro-smart.com | 84.1 USD | — | — |
| Temperature High limit L6 99C | hydro-smart.com | 84.1 USD | — | — |
| Foldback copper Electric Element square flange 6KW 240V | hydro-smart.com | 76.03 USD | — | — |
| Terminal Block 600V 3Poles 175A line 2/0-14 load (4X) 2/0-14 | hydro-smart.com | 74.88 USD | — | — |
| Thermo 2000 Mini Ultra Controller Wiring Harness | nordikradiant.com | 70.31 CAD | — | — |
| Thermo 2000 BTH Ultra Controller Wiring Harness | nordikradiant.com | 69.05 CAD | — | — |
| Foldback copper Electric Element square flange 5KW 240V | hydro-smart.com | 66.82 USD | — | — |
| Foldback copper Electric Element square flange 4,5KW 240V | hydro-smart.com | 59.9 USD | — | — |
| Foldback copper Electric Element square flange 3KW 240V | hydro-smart.com | 57.6 USD | — | — |
| Optional outdoor temperature sensor in a connection box | hydro-smart.com | 56.45 USD | — | — |
| Control wire harness for BTH ULTRA | hydro-smart.com | 55.3 USD | — | — |
| Thermo-manometer black 2-1/2''dia. 0/75psi, 0/160C 1/2'' NPT back | hydro-smart.com | 51.84 USD | — | — |
| Transformer Open Type Prim 240V or 208V/Sec.24V 40VA | hydro-smart.com | 49.54 USD | — | — |
| Transformer Open Type Prim 240V or 208V/Sec.24V 50VA | hydro-smart.com | 49.54 USD | — | — |
| Terminal Block 600V 3Poles 115A line 2-14 load 2-14 | hydro-smart.com | 49.54 USD | — | — |
| Control wire harness for MINI ULTRA | hydro-smart.com | 48.38 USD | — | — |
| Mini BTH / Mini Ultra and BTH Ultra High Limit Well | nordikradiant.com | 46.45 CAD | — | — |
| Thermo 2000 Mini Ultra / BTH Ultra Thermowell | nordikradiant.com | 46.45 CAD | — | — |
| Thermo 2000 Mini BTH aquastat G1 Well | nordikradiant.com | 46.45 CAD | — | — |
| Power relay 30amp contact for heating elements, coil 24VAC | hydro-smart.com | 44.93 USD | — | — |
| Safety Relief Valve ASME 3/4"M x 3/4''F 535 MBH 30PSI Br | hydro-smart.com | 40.32 USD | — | — |
| Thermal Well 3/8''NPT | hydro-smart.com | 36.86 USD | — | — |
| Boiler water temperature sensor | hydro-smart.com | 34.56 USD | — | — |
| Terminal Block 600V 1Pole 175A line 1x2/0-8 load 1x2/0-8 | hydro-smart.com | 33.41 USD | — | — |
| Standard outdoor temperature sensor | hydro-smart.com | 29.95 USD | — | — |